Joseph eubelin



UNITED STATES PATENT OFFICE.

JOSEPH RUBELIN, F OOMO, ITALY, AssIeNon T0 WILLIAM MEISTER, OF NEW YORK, N. Y.

PROCESS OF TREATING SILK PREPARATORY T0 DYEING AND WEAVING.

SPECIFICATION formingpart of Letters Patent No. 270,557, dated January 9, 1883. Application filed October 7, 1882. (Speoimens.) Patented in Italy April 24, 1882, No. 14,064.

To all whom it may concern Be known that l, J OSEPH RUBELIN, of Como, in the Kingdom of Italy, have invented certain new and useful Improvements in Treating SilkThreads Preparatory to Dyeingand Weaving, of which the following is a specification.

The invention consists in immersing the silk threads in a solution of the bichloride of tin or the double salts of the tetrachloride of tin :0 with the chlorides of the alkalies or alkaline earths, then fixing the same by means ofa bath of a caustic or carbonated alkali.

In carrying out this invention I prefer a solution of tetrachloride of tin of the strength of 35 Baum, (31101 in which I steep the silk threads. The silk is then withdrawn from the solution and the surplus liquor is removed by first wringing the hanks, then washing them, and then drying them by means of a centrifugal machine or otherwise. The silk threads are next passed several times in succession through a bath of an alkali or the carbonate of an alkali, preferably a solution of soda crystal at a temperature of about 45 cen- 2 5 tigrade, and are then wrung and washed and dried, as before. This operation may be re- WWW" pea'ted several times until, the desired condition is obtained. This treatment causes the silk threads to be dyed more evenly, and tends to increase the brilliancy of the color, to give a greater body and durability to the silk, and also to render it less inflammable.

What is claimed as the invention is The process herein described of treating silk threads, which consists in subjecting the 5 same to the action of a solution of tetrachloride of tin, or the double salts formed by said tetrachloride of tin, with the chlorides of the alkalies or alkaline earths, and next fixing the deposit of said salts in the fibers by subjecting said fibers to the action of a solution of a caustic alkali or a carbonate of the alkalies, and repeating these operations until the proper efi'ect is obtained, substantinlly as set forth.

. In testimony that I claim the foregoing as 5 my invention I have signed my name in presence of two subscribing witnesses.

JOSEPH RUBELIN.

Witnesses:

O. HELBERG, ENEA GELFY-ZIMA. 

